java/jsp获取当前路径的几种方法

本文结合个人实验与网上资料整合@http://blog.csdn.net/snannan_268/article/details/5511614


String path = new File(application.getRealPath(request.getServletPath() )).getParent();   //路径获取jsp文件绝对路径

1、利用System.getProperty()函数获取当前路径: 
System.out.println(System.getProperty("user.dir"));//user.dir指定了当前的路径 

2、使用File提供的函数获取当前路径: 
File directory = new File("");//设定为当前文件夹 
try{ 
    System.out.println(directory.getCanonicalPath());//获取标准的路径 
    System.out.println(directory.getAbsolutePath());//获取绝对路径 
}catch(Exceptin e){} 

File.getCanonicalPath()和File.getAbsolutePath()大约只是对于new File(".")和new File("..")两种路径有所区别。 

# 对于getCanonicalPath()函数,“."就表示当前的文件夹,而”..“则表示当前文件夹的上一级文件夹 
# 对于getAbsolutePath()函数,则不管”.”、“..”,返回当前的路径加上你在new File()时设定的路径 
# 至于getPath()函数,得到的只是你在new File()时设定的路径 

比如当前的路径为 C:/test : 
File directory = new File("abc"); 
directory.getCanonicalPath(); //得到的是C:/test/abc 
directory.getAbsolutePath();    //得到的是C:/test/abc 
direcotry.getPath();                    //得到的是abc 

File directory = new File("."); 
directory.getCanonicalPath(); //得到的是C:/test 
directory.getAbsolutePath();    //得到的是C:/test/. 
direcotry.getPath();                    //得到的是. 

File directory = new File(".."); 
directory.getCanonicalPath(); //得到的是C:/ 
directory.getAbsolutePath();    //得到的是C:/test/.. 
direcotry.getPath();                    //得到的是.. 


另外:System.getProperty()中的字符串参数如下: 
System.getProperty()参数大全 
# java.version                                Java Runtime Environment version  
# java.vendor                                Java Runtime Environment vendor  
# java.vendor.url                           Java vendor URL  
# java.home                                Java installation directory  
# java.vm.specification.version   Java Virtual Machine specification version  
# java.vm.specification.vendor    Java Virtual Machine specification vendor  
# java.vm.specification.name      Java Virtual Machine specification name  
# java.vm.version                        Java Virtual Machine implementation version  
# java.vm.vendor                        Java Virtual Machine implementation vendor  
# java.vm.name                        Java Virtual Machine implementation name  
# java.specification.version        Java Runtime Environment specification version  
# java.specification.vendor         Java Runtime Environment specification vendor  
# java.specification.name           Java Runtime Environment specification name  
# java.class.version                    Java class format version number  
# java.class.path                      Java class path  
# java.library.path                 List of paths to search when loading libraries  
# java.io.tmpdir                       Default temp file path  
# java.compiler                       Name of JIT compiler to use  
# java.ext.dirs                       Path of extension directory or directories  
# os.name                              Operating system name  
# os.arch                                  Operating system architecture  
# os.version                       Operating system version  
# file.separator                         File separator ("/" on UNIX)  
# path.separator                  Path separator (":" on UNIX)  
# line.separator                       Line separator ("/n" on UNIX)  
# user.name                        User’s account name  
# user.home                              User’s home directory  
# user.dir                               User’s current working directory

JAVA中获取路径

关键字: java中获取路径
JAVA中获取路径: 


1.jsp中取得路径: 
  
以工程名为TEST为例: 

(1)得到包含工程名的当前页面全路径:request.getRequestURI() 
结果:/TEST/test.jsp 
(2)得到工程名:request.getContextPath() 
结果:/TEST 
(3)得到当前页面所在目录下全名称:request.getServletPath() 
结果:如果页面在jsp目录下 /TEST/jsp/test.jsp 
(4)得到页面所在服务器的全路径:application.getRealPath("页面.jsp") 
结果:D:/resin/webapps/TEST/test.jsp 
(5)得到页面所在服务器的绝对路径:absPath=new java.io.File(application.getRealPath(request.getRequestURI())).getParent(); 
结果:D:/resin/webapps/TEST 

2.在类中取得路径: 

(1)类的绝对路径:Class.class.getClass().getResource("/").getPath() 
结果:/D:/TEST/WebRoot/WEB-INF/classes/pack/ 
(2)得到工程的路径:System.getProperty("user.dir") 
结果:D:/TEST 

3.在Servlet中取得路径: 

(1)得到工程目录:request.getSession().getServletContext().getRealPath("") 参数可具体到包名。 
结果:E:/Tomcat/webapps/TEST 
(2)得到IE地址栏地址:request.getRequestURL() 
结果:http://localhost:8080/TEST/test 
(3)得到相对地址:request.getRequestURI() 
结果:/TEST/test 
jsp亲测

--ROOT/player.jsp

<%@page language="java" contentType="text/html;charset=utf-8"%>

<%@page language="java" contentType="text/html;charset=utf-8" pageEncoding="utf-8"%>
<%@page import="java.io.*"%>

<%
String path = new File(application.getRealPath(request.getServletPath() )).getParent();   //路径
out.println(path+"    "+request.getServletPath()+"<br/>" );
out.println(System.getProperty("user.dir")+"<br/>");
 out.println("-------------------------<br/>");
File directory = new File("");//设定为当前文件夹 

    out.println(directory.getCanonicalPath()+"<br/>");//获取标准的路径 
    out.println(directory.getAbsolutePath()+"<br/>");//获取绝对路径 
 out.println("-------------------------<br/>");
directory = new File("abc"); 
 out.println(directory.getCanonicalPath()+"<br/>");//获取标准的路径 
    out.println(directory.getAbsolutePath()+"<br/>");//获取绝对路径 
 out.println(directory.getPath()+"<br/>");//获取标准的路径 
 out.println("-------------------------<br/>");
directory = new File("."); 
out.println(directory.getCanonicalPath()+"<br/>");//获取标准的路径 
    out.println(directory.getAbsolutePath()+"<br/>");//获取绝对路径 
 out.println(directory.getPath()+"<br/>");//获取标准的路径 
 out.println("-------------------------<br/>");
directory = new File(".."); 
out.println(directory.getCanonicalPath()+"<br/>");//获取标准的路径 
 out.println(directory.getAbsolutePath()+"<br/>");//获取绝对路径 
 out.println(directory.getPath()+"<br/>");//获取标准的路径 
 
 out.println("-------------------------<br/>");//<span style="color: rgb(51, 51, 51); font-family: Arial; font-size: 14px; line-height: 26px;">.jsp中取得路径:</span><span style="color: rgb(51, 51, 51); font-family: Arial; font-size: 14px; line-height: 26px;">3.在Servlet中取得路径: </span>
 
 out.println(request.getRequestURI() +"<br/>");
 out.println(request.getContextPath() +"<br/>");
 out.println(request.getServletPath() +"<br/>");
 out.println(application.getRealPath("player.jsp") +"<br/>");
 out.println(new File(application.getRealPath(request.getRequestURI())).getParent() +"<br/>");
 out.println(request.getSession().getServletContext().getRealPath("") +"<br/>");<span style="font-family: Arial;">//3.在Servlet中取得路径: </span>
 out.println(request.getRequestURL() +"<br/>");

%>

结果如下

F:\WebSpace\J2EE\web\webapps\ROOT /player.jsp
C:\Users\FuChenD
-------------------------
C:\Users\FuChenD
C:\Users\FuChenD
-------------------------
C:\Users\FuChenD\abc
C:\Users\FuChenD\abc
abc
-------------------------
C:\Users\FuChenD
C:\Users\FuChenD\.
.
-------------------------
C:\Users
C:\Users\FuChenD\..
..
-------------------------
/player.jsp

/player.jsp
null
F:\WebSpace\J2EE\web\webapps\ROOT
F:\WebSpace\J2EE\web\webapps\ROOT\
http://www.lovedxy.com:8080/player.jsp


--G:/Media/player.jsp

</pre>结果如下<p><pre name="code" class="html">G:\Media /player.jsp
C:\Users\FuChenD
-------------------------
C:\Users\FuChenD
C:\Users\FuChenD
-------------------------
C:\Users\FuChenD\abc
C:\Users\FuChenD\abc
abc
-------------------------
C:\Users\FuChenD
C:\Users\FuChenD\.
.
-------------------------
C:\Users
C:\Users\FuChenD\..
..
-------------------------
/Media/player.jsp
/Media
/player.jsp
null
G:\Media\Media
G:\Media\
http://www.lovedxy.com:8080/Media/player.jsp

--G:/Media/四大名著之三国演义/player.jsp

</pre>结果如下<p><pre name="code" class="html">G:\Media\四大名著之三国演义 /四大名著之三国演义/player.jsp
C:\Users\FuChenD
-------------------------
C:\Users\FuChenD
C:\Users\FuChenD
-------------------------
C:\Users\FuChenD\abc
C:\Users\FuChenD\abc
abc
-------------------------
C:\Users\FuChenD
C:\Users\FuChenD\.
.
-------------------------
C:\Users
C:\Users\FuChenD\..
..
-------------------------
/Media/%E5%9B%9B%E5%A4%A7%E5%90%8D%E8%91%97%E4%B9%8B%E4%B8%89%E5%9B%BD%E6%BC%94%E4%B9%89/player.jsp
/Media
/四大名著之三国演义/player.jsp
null
G:\Media\Media\%E5%9B%9B%E5%A4%A7%E5%90%8D%E8%91%97%E4%B9%8B%E4%B8%89%E5%9B%BD%E6%BC%94%E4%B9%89
G:\Media\
http://www.lovedxy.com:8080/Media/%E5%9B%9B%E5%A4%A7%E5%90%8D%E8%91%97%E4%B9%8B%E4%B8%89%E5%9B%BD%E6%BC%94%E4%B9%89/player.jsp




posted @ 2016-03-12 17:54  断桥相约  阅读(1645)  评论(0编辑  收藏  举报